TSK · Leviticus 14:30

If she cannot afford a lamb, then she shall take two turtledoves, or two young pigeons; the one for a burnt offering, and the other for a sin offering: and the priest shall make atonement for her, and she shall be clean.'"

"'On the eighth day he shall take two turtledoves, or two young pigeons, and come before Yahweh to the door of the Tent of Meeting, and give them to the priest:

and to offer a sacrifice according to that which is said in the law of the Lord, "A pair of turtledoves, or two young pigeons."